Make a new GUI::Window with A Button - Open3D

[vanloctc]

Hi Open3D Teams and Everyone,

Thank you for your hard work - Open3D Teams.
I'm investigating Open3D Library and wondering that Is there any Open3D-API support for new a window (separate window) when clicking the button - from the main screen.

1. The GUI::Window can create by a singleton class. So If I want to add a new window. I need to use
   (Step1) open3D::visualization::GUI::Application::AddWindow(main screen)
   (Step2) Application::Run().
2. If I want to add one more window, I will add by the same way
   (Step1) open3D::visualization::GUI::Application::AddWindow(main screen 1)
   (Step2) open3D::visualization::GUI::Application::AddWindow(main screen 2)
   (Step3) Application::Run().
3. I am wondering, Does Open3D support the button for making a new window?
   (Step1) open3D::visualization::GUI::Application::AddWindow(main screen 1) --> Button "CreateWindow"
   (Step2) Application::Run().
   (Step3) the user selects "CreateWindow" Button, the new window appear (include GUI and Visualizer)

Thank you very much.
open3d.visualization.gui.Application Link - version 0.13.0

GUI
UI
Window

[errissa]

Yes, it is possible to create a new window from a callback once the application is running. Your point number 3 is correct. For an example of multiple windows please see the example examples/python/gui/multiple-windows.py. It's in Python but the Python API is almost exactly the same as the C++ API so it should be helpful.

[errissa]

We actually have a C++ version of the multiple-windows.py example. It's called MultipleWindows.cpp and can be found here.

[vanloctc]

We actually have a C++ version of the multiple-windows.py example. It's called MultipleWindows.cpp and can be found here.

Thank you for your answer.
I was really surprised when you said that Open3D had supported for (3). Let's me make a clearly (3) above:
Step1: open3D::visualization::GUI::Application::AddWindow(main screen 1) --> Button "CreateWindow"
Step2: Application::Run().
Step3: The user selects "CreateWindow" Button for making a new window
Step4: The "CreateWindow" Button can call open3D::visualization::GUI::Application::AddWindow(Separate Screen) for open/close this window
--> "Separate Screen" - new window - can contain "GUI(Button), Image or visualizer class . <--- Is this right?
ForEx: I take an interface of Open3D Reconstruction [Version0.13.0] for example. See image Open3D-Window.png below for details.
Thank you very much.

[errissa]

Yes, correct. As I said, please take a look at MutlipleWindows.cpp example code, specifically the OnSnapshot callback. Unless I misunderstand your question the MultipleWindows.cpp example does exactly what you want to do.

[vanloctc]

Yes, correct. As I said, please take a look at MutlipleWindows.cpp example code, specifically the OnSnapshot callback. Unless I misunderstand your question the MultipleWindows.cpp example does exactly what you want to do.

Yes, I had tried at both MultipleWindow source code (C++ and Python). But after selecting "Take snapshot in new window Button", it will display a new window and then close all programs without any messager. I don't see anything unusual in the source code. Is that an error?
See the image below for details.

My Open3D information:

1. Version 0.13.0
2. Install on Window 10

Besides, Is there any support with GUI::Application?. I really want to know a function as "add_action" at O3DVisualizer Class, but that does not exist at GUI::Application class (link below) http://www.open3d.org/docs/0.13.0/python_api/open3d.visualization.gui.Application.html#open3d.visualization.gui.Application

Thank you very much.